200=12t+4.9t^2

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Solution for 200=12t+4.9t^2 equation:


Simplifying
200 = 12t + 4.9t2

Solving
200 = 12t + 4.9t2

Solving for variable 't'.

Reorder the terms:
200 + -12t + -4.9t2 = 12t + -12t + 4.9t2 + -4.9t2

Combine like terms: 12t + -12t = 0
200 + -12t + -4.9t2 = 0 + 4.9t2 + -4.9t2
200 + -12t + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
200 + -12t + -4.9t2 = 0.0

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-40.81632653 + 2.448979592t + t2 = 0

Move the constant term to the right:

Add '40.81632653' to each side of the equation.
-40.81632653 + 2.448979592t + 40.81632653 + t2 = 0 + 40.81632653

Reorder the terms:
-40.81632653 + 40.81632653 + 2.448979592t + t2 = 0 + 40.81632653

Combine like terms: -40.81632653 + 40.81632653 = 0.00000000
0.00000000 + 2.448979592t + t2 = 0 + 40.81632653
2.448979592t + t2 = 0 + 40.81632653

Combine like terms: 0 + 40.81632653 = 40.81632653
2.448979592t + t2 = 40.81632653

The t term is 2.448979592t.  Take half its coefficient (1.224489796).
Square it (1.499375261) and add it to both sides.

Add '1.499375261' to each side of the equation.
2.448979592t + 1.499375261 + t2 = 40.81632653 + 1.499375261

Reorder the terms:
1.499375261 + 2.448979592t + t2 = 40.81632653 + 1.499375261

Combine like terms: 40.81632653 + 1.499375261 = 42.315701791
1.499375261 + 2.448979592t + t2 = 42.315701791

Factor a perfect square on the left side:
(t + 1.224489796)(t + 1.224489796) = 42.315701791

Calculate the square root of the right side: 6.505052021

Break this problem into two subproblems by setting 
(t + 1.224489796) equal to 6.505052021 and -6.505052021.

Subproblem 1

t + 1.224489796 = 6.505052021 Simplifying t + 1.224489796 = 6.505052021 Reorder the terms: 1.224489796 + t = 6.505052021 Solving 1.224489796 + t = 6.505052021 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.224489796' to each side of the equation. 1.224489796 + -1.224489796 + t = 6.505052021 + -1.224489796 Combine like terms: 1.224489796 + -1.224489796 = 0.000000000 0.000000000 + t = 6.505052021 + -1.224489796 t = 6.505052021 + -1.224489796 Combine like terms: 6.505052021 + -1.224489796 = 5.280562225 t = 5.280562225 Simplifying t = 5.280562225

Subproblem 2

t + 1.224489796 = -6.505052021 Simplifying t + 1.224489796 = -6.505052021 Reorder the terms: 1.224489796 + t = -6.505052021 Solving 1.224489796 + t = -6.505052021 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.224489796' to each side of the equation. 1.224489796 + -1.224489796 + t = -6.505052021 + -1.224489796 Combine like terms: 1.224489796 + -1.224489796 = 0.000000000 0.000000000 + t = -6.505052021 + -1.224489796 t = -6.505052021 + -1.224489796 Combine like terms: -6.505052021 + -1.224489796 = -7.729541817 t = -7.729541817 Simplifying t = -7.729541817

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.280562225, -7.729541817}

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